drm/msm: Fix a5xx/a6xx timestamps

They were reading a counter that was configured to ALWAYS_COUNT (ie.
cycles that the GPU is doing something) rather than ALWAYS_ON.  This
isn't the thing that userspace is looking for.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Jordan Crouse <jordan@cosmicpenguin.net>
Message-Id: <20210325012358.1759770-2-robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 7e553d3..ce13d49 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1386,8 +1386,8 @@ static int a5xx_pm_suspend(struct msm_gpu *gpu)
 
 static int a5xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value)
 {
-       *value = gpu_read64(gpu, REG_A5XX_RBBM_PERFCTR_CP_0_LO,
-               REG_A5XX_RBBM_PERFCTR_CP_0_HI);
+       *value = gpu_read64(gpu, REG_A5XX_RBBM_ALWAYSON_COUNTER_LO,
+               REG_A5XX_RBBM_ALWAYSON_COUNTER_HI);
 
        return 0;
 }

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index cb2df87..5b438f3 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1228,8 +1228,8 @@ static int a6xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value)
        /* Force the GPU power on so we can read this register */
        a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET);
 
-       *value = gpu_read64(gpu, REG_A6XX_RBBM_PERFCTR_CP_0_LO,
-               REG_A6XX_RBBM_PERFCTR_CP_0_HI);
+       *value = gpu_read64(gpu, REG_A6XX_CP_ALWAYS_ON_COUNTER_LO,
+               REG_A6XX_CP_ALWAYS_ON_COUNTER_HI);
 
        a6xx_gmu_clear_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET);
        mutex_unlock(&perfcounter_oob);